DESIGN OF THE VIRTUAL DEVICE FOR THE SIGNAL SPECTRUM CALCULATION IN THE LABVIEW ENVIRONMENT

2019 ◽  
Author(s):  
Tossenko O.M.
Keyword(s):  
Virtual Instrument ◽  
Spectral Characteristics ◽  
Spectral Composition ◽  
Automated System ◽  
Signal Spectrum ◽  
Measuring Instruments ◽  
Specific Information ◽  
Measuring Device ◽  
Virtual Device ◽  
Graphical Tool

The development of measuring instruments requires a specialist to know the principles of operation of advanced measuring systems. This article describes guidelines for creating a virtual appliance in LabVIEW. LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is a graphical application programming environment used as a standard tool for measuring, analyzing their data, further ma­ naging devices and objects under study. LabVIEW language is not like other programming languages. It does not create a program, but a virtual tool, designed not only for the simulation of certain processes, but also for the management of hardware and the study of real physical objects. The article deals with the task of designing application software for a specific information-measuring device, analyzes the capabilities of the LabVIEW environment for spectral analysis of various signals, outlines the basic principles and techniques of programming within the framework of the LabVIEW graphical environment during the basic stages of development. The procedure for creating a virtual device is described, which allows to evaluate the spectral composition of the signals, presents a graphical code of execution (diagram) to the program and a graphical tool interface of the virtual device. A number of basic elements used to develop the program are described. The simplicity of the graphic designs, the ease of installation on the field of the program, the clarity and readability of the program — all of which makes LabVIEW preferred over other languages of programming. In most cases, the experiment is the only source of reliable information. And the result is achieved much faster than the methods of "pure" theory. The article substantiates the effectiveness of using a development tool that allows to obtain a software product and ensure the fulfillment of all the basic functions of an automated system. Developing a software algorithm for calculating statistical parameters will help engineering students understand the order of determining spectral characteristics and their place in the structure of experimental research.

scholarly journals DESIGN AND IMPLEMENTATION OF AUTOMATED SYSTEM FOR MEASURING CAR BATTERY CAPACITY

2020 ◽  
Vol 4 (52) ◽  
pp. 51-59
Author(s):  
M. Suchanovský ◽  
◽  
J. Molnár ◽  
O. Slavko ◽  
◽  
...  
Keyword(s):  
Automatic Measurement ◽  
Internal Resistance ◽  
Automated System ◽  
Measuring System ◽  
Measuring Instruments ◽  
Experimental Sample ◽  
Computer Design ◽  
Measuring Device ◽  
Applied Software ◽  
Battery Capacity

Purpose. The purpose of this article is to design hardware for an automated system for measuring the parameters of the car battery and the subsequent approximation of its capacity and other parameters necessary to determine its condition. Originality. The paper deals with the research on the car batteries and measuring instruments to detect their parameters in order to determine a suitable software solution for automated measuring system to measure the car battery capacity. Methodology. The paper proposes one of the possibilities for development an automated system for measuring car battery capacity basing on microcontrollers system using prototyping, designing, simulation and testing techniques. Authors described the whole development process starting from computer design of the proposed device, chose the elements for hardware unit, prototyping using development boards and tools, developing program algorithms and implementing related applied software with the final results verification. Result. In this work authors proposed hardware solution of an automated system for measuring the capacity of a car battery. The whole design concept consisted of the selection of the main hardware components, which were then implemented into a complex functional unit. Following it was designed a software solution. This proposal was initiated by a program for measuring the parameters of the battery, then the calculation of the internal resistance from the measured parameters and the approximation of capacity on the basis of the detected life-span was added to this programme. A Web page was then created. Practical value. Proposed experimental sample could be practically used for automatic measurement of car battery capacity and also could be served as an experimental sample of remote measuring device. References 14, figures 14.

Design for New Gear Measuring Centers

2016 ◽  
Vol 693 ◽  
pp. 1562-1566
Author(s):  
Xiao Sheng Wang ◽  
Xue Bin Liu ◽  
Wei Zhao
Keyword(s):  
Coordinate System ◽  
Measuring Instruments ◽  
Single Measure ◽  
Measuring Device ◽  
Complex Operation

For existing disadvantage in gear measuring instruments, such as single measure, complex operation, expensive, and so on, in the paper primary and secondary coordinate system are established based on the theoretic of positioning coordinates and gear, then the introduction of feedback measuring device can be integrated in the design of a manufacturing new gear during the measurement center.

Half division two-dimensional method for simple sinusoidal quantities parameters accurate measurement

2021 ◽  
pp. 16-21
Author(s):  
Kirill Yu. Solomentsev ◽  
Vyacheslav I. Lachin ◽  
Aleksandr E. Pasenchuk
Keyword(s):  
Measuring Instruments ◽  
Measured Signal ◽  
Two Dimensional ◽  
Measuring Device ◽  
New Approach ◽  
Precision Measuring ◽  
Useful Signal ◽  
Midpoint Method ◽  
Order Of Magnitude ◽  
Current Measuring

Several variants of half division two-dimensional method are proposed, which is the basis of a fundamentally new approach for constructing measuring instruments for sinusoidal or periodic electrical quantities. These measuring instruments are used in the diagnosis of electric power facilities. The most general variant, called midpoint method, is considered. The proposed midpoint method allows you to measure much smaller than using widespread methods, alternating currents or voltages, especially when changing the amplitude of the measured signal in very wide ranges, by 1–2 orders of magnitude. It is shown that using the midpoint method it is possible to suppress sinusoidal or periodic interference in the measuring path, in particular, to measure small alternating current when sinusoidal or periodic interference is 1–2 orders of magnitude higher than the useful signal. Based on the results of comparative tests, it was found that the current measuring device implementing the midpoint method is an order of magnitude more sensitive than the currently used high-precision measuring instruments.

scholarly journals PERANCANGAN PENGUKURAN TEGANGAN TINGGI PADA MODUL PEMBANGKIT TEGANGAN TINGGI IMPULS

TRANSIENT ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 1002
Author(s):  
Chyntia Dewi Candra Pravitasari ◽  
Abdul Syakur ◽  
Budi Setiyono
Keyword(s):  
High Voltage ◽  
Average Error ◽  
Measuring Instruments ◽  
Measuring Device ◽  
Final Project ◽  
A Value ◽  
Voltage Generator ◽  
Monitoring Module ◽  
Impulse High Voltage ◽  
High Voltage Generator

Measurement of high voltage AC, DC and Impulses on a laboratory scale using expensive measuring instruments. In addition, the measurements taken are at a voltage level of 15 KV. Integrated measurement of high voltage AC, DC and Impulses for 15 KV voltage levels using sign transformers has never been done. Whereas high voltage generation using a sign transformer is only able to generate voltage up to 15 KV voltage only. For that we need a voltage measuring device that is able to measure up to a voltage of 15 KV, and does not require expensive costs. In this Final Project, a high voltage monitoring module for impulse high voltage generator module will be designed using visual studio c #. The results of monitoring the high voltage generator module on the C # visual studio form successfully went well. The voltage test performed produces a value close to the actual value with an average error of 0.01 volts. Unfortunately this test is still not perfect because it is still susceptible to noise so that the measurement process is often interrupted.

Computer system for metrological testing of location sensors used to monitor the patient's condition in magnetotherapy

2021 ◽  
Author(s):  
S.G. Gurzhin ◽  
V.L. Nguyen ◽  
A.V. Shulyakov
Keyword(s):  
Personal Computer ◽  
Physiological State ◽  
Objective Assessment ◽  
Metrological Certification ◽  
Linear Displacement ◽  
Operating Conditions ◽  
The Body ◽  
Measuring Instruments ◽  
Virtual Device ◽  
The Law

Non-contact monitoring of vital signs of a person is a reliable and safe way of promptly obtaining objective diagnostic information about the current physiological state of a patient during surgical operations, physiotherapeutic procedures or during sleep. The absence of direct contact of the sensors with the patient's body makes it possible to exclude the influence of a number of interfering factors, such as a violation or weakening of contact, which can lead to a deterioration in the quality of signals from the output of the sensors, a long-term location of the sensors on the body can have a psychological effect on the patient, changing his condition and thereby distorting the treatment method, etc. In order for the results of monitoring and diagnostics to be reliable and guaranteed accurate, it is necessary to carry out periodic metrological certification of location sensors, especially since many of them are of foreign production and their characteristics are either not standardized or do not meet the requirements of their operating conditions. Therefore, the tasks of developing methods and means for carrying out metrological tests of non-contact sensors for medical purposes are becoming urgent. Purpose – to show the possibility of implementing automated metrological tests of location sensors for medical use based on a personal computer and publicly available standard hardware and software. A method has been developed and implemented for conducting metrological tests of location sensors based on a personal computer, a digital dynamic measure of linear displacement, virtual measuring instruments, laser and ultrasonic sensors, as well as determining conversion errors in the LabVIEW environment. As an exemplary measuring instrument, it is proposed to use a webcam with a virtual device for recording the law of displacement in the LabVIEW Vison Development application. Full-scale experiments have been carried out, in which, using a digital measure of linear displacement, it is possible to reproduce with high accuracy almost any law of displacement and to regulate its informative parameters. Real movement signals were received with the help of virtual devices, recorded by two location sensors and a web camera. The errors of the means of registration are determined in comparison with the given digital method and analytically the law of movement. Introduction of the developed method and hardware and software for metrological certification of sensors of diagnostic channels of the systems of complex magnetotherapy «Multimag» and «Relaxmag». Carrying out automated metrological tests of sensors will ensure prompt, reliable and objective control of their actual characteristics, which means it will increase the effectiveness of treatment due to the prompt and continuous monitoring of the patient's functional state and an objective assessment of a number of important indicators.

scholarly journals Emission spectra of light-pollution sources determined from the light-scattering spectrometry of the night sky

2019 ◽  
Vol 491 (4) ◽  
pp. 5586-5594
Author(s):  
Miroslav Kocifaj ◽  
František Kundracik ◽  
Ondrej Bilý
Keyword(s):  
Light Scattering ◽  
Field Experiments ◽  
Spectral Composition ◽  
Emission Spectra ◽  
Pollution Sources ◽  
Light Pollution ◽  
Ambient Atmosphere ◽  
Artificial Light ◽  
Measuring Device ◽  
Night Sky

ABSTRACT The emission spectrum of a light-pollution source is a determining factor for modelling artificial light at night. The spectral composition of skyglow is normally derived from the initial spectra of all artificial light sources contributing to the diffuse illumination of an observation point. However, light scattering in the ambient atmosphere imposes a wavelength-specific distortion on the optical signals captured by the measuring device. The nature of the emission, the spectra and the light-scattering phenomena not only control the spectral properties of the ground-reaching radiation, but also provide a unique tool for remote diagnosis and even identification of the emission spectra of the light-polluting sources. This is because the information contained in the night-sky brightness is preferably measured in directions towards a glowing dome of light over the artificial source of light. We have developed a new method for obtaining the emission spectra using remote terrestrial sensing of the bright patches of sky associated with a source. Field experiments conducted in Vienna and Bratislava have been used to validate the theoretical model and the retrieval method. These experiments demonstrate that the numerical inversion is successful even if the signal-to-noise ratio is small. The method for decoding the emission spectra by the light-scattering spectrometry of a night sky is a unique approach that enables for (i) a systematic characterization of the light-pollution sources over a specific territory, and (ii) a significant improvement in the numerical prediction of skyglow changes that we can expect at observatories.

scholarly journals Luminous and Melanopic Efficiency Performance of Phosphor-Converted LEDs with Tunable Spectral Characteristics

2020 ◽  
Vol 10 (18) ◽  
pp. 6198
Author(s):  
Peiyu Wu ◽  
Jiaqi Ju ◽  
Qi Yao
Keyword(s):  
Intensity Distribution ◽  
Emission Intensity ◽  
Spectral Characteristics ◽  
Spectral Composition ◽  
Light Sources ◽  
Peak Wavelength ◽  
Efficiency Performance ◽  
Circadian Effect ◽  
Color Rendering ◽  
Blue Intensity

In this work, we investigated the luminous and melanopic efficiency of the radiation (LER/MER) performances of phosphor-converted LEDs (PC LEDs) with tunable spectral characteristics, namely peak wavelength, full width at half maximum (FWHM), and emission intensity. We constructed theoretical PC LED spectra based on the characteristics extracted from the database of IES TM-30-15, analyzed the relations between LER/MER and different spectral characteristics, and proposed spectral composition strategies at various correlated color temperatures (CCTs). Results showed that both MER and LER are linear with the FWHM of phosphor within the peak wavelength range in practical use, but the change in values by tuning emission intensity varies with spectral compositions. Hence, different spectral characteristics should be considered comprehensively. We further explored the trade-off between luminous and melanopic efficiency. Lowering the FWHM of phosphor and the intensity distribution of the blue LED can obtain higher LER and low circadian effect at lower CCT. As CCT increases, considering color rendering and the increase in the blue intensity distribution, besides reducing FWHM, tuning the peak wavelength close to the peak wavelength of V(λ) helps to reduce the circadian effect. These investigations provide optimization strategies for ideal melanopic and luminous performance of PC LED light sources.

scholarly journals Spectral Characteristics of Acoustic Emission in Carbon Fiber-Reinforced Composite Materials Subjected to Cyclic Loading

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Vladimir L. Shkuratnik ◽  
Petr V. Nikolenko
Keyword(s):  
Acoustic Emission ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Spectral Characteristics ◽  
Spectral Composition ◽  
Low Frequency ◽  
Sharp Change ◽  
Kaiser Effect ◽  
Emission Activity ◽  
The Time Domain

The article is devoted to the investigation of the spectral characteristics of acoustic emission signals that appear under various schemes of composite materials loading. The tests involved samples of composites reinforced with layers sheets of carbon fiber fabric and dispersed carbon fibers. Based on the results of laboratory tests, a comparison is made between the traditional parameters of acoustic emission and the complete spectrograms of the acoustic emission response developed with the use of a special algorithm. The relationship between the emission activity and the change in the spectral composition of emission hits is shown. For example, for some composites, the acoustic emission memory effect (Kaiser effect) manifests itself not only in the time domain but also in the spectral domain in a form of a sharp change in the amplitudes in the frequency range 130/150 kHz. Also, when the samples were loaded according to the Brazilian scheme, the presence of the so-called “inverse” Kaiser effect is observed, in which the memory carrier “remembers” the previously experienced level of tensile stresses and reproduces this information during subsequent unloading. Such effect manifests itself in the form of a sharp change in the amplitudes in the low-frequency region of the spectrum.

scholarly journals Musical Information Visualization System

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
Roman O. Yaroshenko
Keyword(s):  
Real Time ◽  
Information Visualization ◽  
Frequency Analysis ◽  
Spectral Composition ◽  
Audio Signal ◽  
Signal Spectrum ◽  
Time Data ◽  
Visualization System ◽  
Music Information ◽  
Led Matrix

The visualisation systems are spread widely as personal computer’s software. The system, that are processing audio data are presented in this article. The system visualizes the ratio of spectrum amplitudes and has fixed frequency binding to colours. The technology of audio signals processing by the device and components of the device were considered. For the increasing information processing speed was used 32bit controller and graphic equalizer with seven passbands. Music visualization it is function, that are spread widely in mediaplayer’s software, on a different operation systems. This function shows animated images that are depends on music signal. Images are usually reproduced in the real time mode and synchronized with a played audio-track. Music and visualization are merges in the different kind of art: opera, ballett, music drama or movies. Dependencies of auditory and visual sensations are used for increasing the emotional perseption for ordinary listeners . In the systems, that are currently being actively promoted, are used several tools for personal computers, such as: After Effects – The Audio Spectrum Effect, VSDC Video Editor Free – Audio Spectrum Visualizer, Magic Music Visuals. The software, that are mentioned above, has a one disadvantage: the using of streaming video is not possible with the simultaneous receipt of audio and requires processing and rendering of the resulting video series. The purpose of the work is to determine the features of spectral analysis of music information and taking into account real-time data processing. Propose a variant of the music information visualization system, which displays the spectral composition of music and the amplitude of individual harmonics, and filling the LED-matrix with the appropriate color depending on the amplitude of the audio signal, with the possibility of wireless signal transmission from the music source to the visual effects device. The technology of frequency analysis of the spectrum with estimation of amplitude of spectrum’s components of the musical data, that is arriving on the device is chosen for this project. The method is based on the analysis of the spectrum in the selected frequency bands, which in turn simplifies the function of finding maxima at different frequencies. The proposed variant of the musical information visualization system provides display on the LED-matrix of colors that correspond to the frequencies spectrum’s components in the musical composition. Moreover, the number of involved LEDs is proportional to the ratio of the amplitudes of the signal’s frequency components. The desired result is achieved by using a Fast Fourier Transform and selecting Khan or Heming windows for providing a better analysis results of the signal spectrum. The amplitudes of the individual components of the spectrum are estimated additionally and each frequency band has its own color. The work of the system is to analyze the components of the spectrum and frequency of musical information. This information affects the display of colors on the LED matrix. The using of a 32-bit microcontroller provides sufficient speed of audio signal processing with minimal delays. For the increasing the accuracy and speed up the frequency analysis, the sound range is divided into seven bands. For this purpose was used seven-band graphic equalizer MSGEQ7. Music information is transmitted to the system via Bluetooth, which greatly simplifies the selection and connection of the music data source.

scholarly journals Автоматизация стенда испытаний судовых электрических машин

2020 ◽  
Author(s):  
A.V. Fomin ◽  
E.V. Fomin
Keyword(s):  
Test Bench ◽  
Block Diagram ◽  
Electrical Equipment ◽  
Electric Machines ◽  
Automated System ◽  
Computer Memory ◽  
Virtual Device ◽  
Processing Data ◽  
Labview Program

В работе рассмотрен один из вариантов повышения эффективности диагностики судового электрооборудования прошедшего ремонт, путем автоматизации испытательного стенда судовых электрических машин. Представлена разработанная блок-схема автоматизированной системы по сбору и обработки данных, а также структурная схема стенда для испытаний электрических машин постоянного и переменного тока. Предложено спроектированное устройство, которое защищает электродвигатель от превышения предельно допустимых параметров, указанных в паспорте на электрооборудование. Приведён пример работы на автоматизированном стенде с помощью виртуального прибора, созданного в программе LabVIEW. Установлено, что стенд позволяет получать визуализацию всех измеряемых параметров в реальном времени и сохраняет полученные данные в память компьютера. Таким образом, автоматизация стенда диагностики судовых электрических машин позволяет повысить эффективность проводимых на нём работ, путём сокращения трудоемкости и повышением качества выполняемых операций.The paper presents one of the options for increasing the efficiency of diagnostics of ship electrical equipment that has undergone repair by automating the test bench. The developed block diagram of an automated system for collecting and processing data, as well as a block diagram of a test bench for testing DC and AC electric machines, is presented. A designed device is proposed that protects the electric motor from exceeding the maximum permissible parameters indicated in the passport for electrical equipment. An example of work on an automated stand using a virtual device created in the LabVIEW program is given. It was found that the stand allows you to get a visualization of all measured parameters in real time and saves the data in computer memory. Thus, the automation of the diagnostic stand of marine electrical machines allows you to increase the efficiency of the work carried out on it, by reducing the complexity and improving the quality of operations.

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